Islamic Azad University at Eslamshahr
Tehran, Iran
Time filter
Source Type

Darvishan M.,Islamic Azad University at Varamin | Tohidi-Moghadam H.R.,Islamic Azad University at Varamin | Zahedi H.,Islamic Azad University at Eslamshahr
Maydica | Year: 2013

To study the effects of ascorbic acid foliar application and limited irrigation in differnet growth stages on physiological and biochemical changes of corn, an experiment was conducted in Varamin, Iran during the growing season of 2012. The experimental design was randomized complete blocks in split plots arrangement with three replications. Main plots included four different levels of irrigation (complete irrigation, irrigation withholding at 8-leaf stage, irrigation withholding at silks appearance stage and irrigation withholding at both 8-leaf stage and silks appearance stages) and different concentration of foliar application of ascorbic acid (vitamin C) (0, 75, and 150 ppm) were allocated to subplots. The results showed that irrigation withholding conditions in different growth stages significantly decreased seed yield, RWC and total chlorophyll but by contrast increased proline content, antioxidant enzymes activity. Ascorbic acid foliar application in irrigation with holding in different growth stages had positive effect on all attributes in this experiment. In general, the results of the present study indicate that usage of AsA reduces the harmful effects of water deficit stress and increases resistance to drought stress in corn plant.

Sadeghi M.,Islamic Azad University at Eslamshahr | Gholami M.,Islamic Azad University at Eslamshahr
International Journal of Circuits, Systems and Signal Processing | Year: 2011

A Novel Distribution Automation is the bonnie state of art, comprising the new architecture based on the flexible electrical network of component together with an open communication structure debate the Future Distribution Automation System. Intelligent Universal Transformer (IUT) comprises from power electronic base equipment in addition with traditional current transformer introducing as an Intelligent Equipment Devices (IED) for Advanced Distribution Automation (ADA) in forthcoming future. In contrast to ordinary transformer, IUT has full control compatibility as it has been considered for intelligent device. In this regards Fuzzy Logic Control (FLC) is an advanced method based on fuzzy logic concept (first issued by Lotfy Zadeh) emphasizes on fuzzy algorithms which are formulated by linguistically rules, employing expert knowledge. Model free system, nonlinearity, robustness and flexibility under parameter variations are the benefit advantages resulting from the fuzzy logic controllers. In this approach four layers IUT topology with the diverse services like DC voltage option, 400 HZ utility for communication, 120 and 240 V AC 60 HZ together with fuzzy logic controller have been considered for evolving the stability, reducing the uncertainty and enhancing the efficiency of whole system. Fuzzy logic control schemes are proposed for employing current source controllers in IGBT inverters at input stage and DC voltage control source in output stage. Real time voltage regulation, automatic sag correction, three-phase power from a single phase line, Harmonic Filtering, Flicker mitigation, options for energy storage, dynamic system monitoring and robustness under load disturbances are the resulting benefits contributed from IUT four layers topology and fuzzy logic controllers.

Khorami M.,Islamic Azad University at Eslamshahr | Sobhani J.,Housing and Urban Development Research Center
International Journal of Civil Engineering | Year: 2013

Worldwide, asbestos fibers utilized in fiber cement boards, have been recognized as harmful materials regarding the public health and environmental pollutions. These concerns motivate the researchers to find the appropriate alternatives to substitute the asbestos material towards the sustainability policies. In this paper, the applicability of asbestos replacement with three types of agricultural waste fibers, including bagasse, wheat and eucalyptus fibers were experimentally investigated. To this end, the flexural behaviour and microstructure of cement composite boards made by addition of 2% and 4% of waste agricultural fibers in combination with and without 5% replacement of silica fume by mass of cement were evaluated. The results of this study attested the applicability of utilized waste agricultural fibers in production of cement composite boards by improving the flexural and energy absorption characteristics, more or less, depending on the type of fibers. Moreover, it is found that application of silica fume in production of cement composite boards led to an increase in flexural strength.

Kazemi M.,Islamic Azad University at Eslamshahr | Verchery G.,Institut Supérieur des Matériaux et Mécaniques Avancés du Mans
Composite Structures | Year: 2016

Buckling strength is the most important design criterion for laminated composite structures subjected to compressive loading. The aim of the present work is to introduce an explicit procedure in designing laminated composite plates for maximum buckling load subjected to strength and stiffness constraints using the polar formalism, which relates stiffness to the critical buckling load in order to simplify the calculation and optimization of the buckling load. The polar representation of plane elasticity is effectively used in this work in order to introduce a unified optimization method. Design for maximum flexural stiffness as well as laminate effective elastic modulus was developed in order to achieve the optimal orientation of the layers giving the maximum buckling strength. Three optimization procedures were proposed. The first one is unconstrained optimization and the two other cases are constrained optimization subjected to the flexural stiffness and the elastic modulus constraints. The quasi-homogeneous laminates, which have been used as a special class of laminate stacks, were proposed as the general solution for the optimal stacking sequence of the layers. © 2016 Elsevier Ltd.

Alizadeh A.,Islamic Azad University at Eslamshahr
Advances in Environmental Biology | Year: 2012

Trichotillomania, which is classified as an impulse control disorder by DSM-IV, is the compulsive urge to pull out one's own hair leading to noticeable hair loss. The research has done ona group of patients who developed to TTM in Iran. This group of patients had experienced medical treatment before coming to psychotherapy. The assessment of patients showed that they have conflict with his or her parent and usually belong to poor families. The psychotherapy process focused on the problem and solved that conflict. After 3 months they achieved his or her hair conspicuously. Their conflict with the parentsincluded their relationship with friends, style of studying, clothing and things like these. When they and parents learned to solve this problem with speaking and attend to each other's beliefs without challenging, their tension decreased. Additionally, the patients taught to use Habit Reversal Training to control his or her impulsive behavior that led to hair pulling.

Bahrami A.,University Putra Malaysia | Bahrami A.,Islamic Azad University at Eslamshahr | Talib Z.A.,University Putra Malaysia | Shahriari E.,University Putra Malaysia | And 3 more authors.
International Journal of Molecular Sciences | Year: 2012

The effects of multi-walled carbon nanotube (MWNT) concentration on the structural, optical and electrical properties of conjugated polymer-carbon nanotube composite are discussed. Multi-walled carbon nanotube-polypyrrole nanocomposites were synthesized by electrochemical polymerization of monomers in the presence of different amounts of MWNTs using sodium dodecylbenzensulfonate (SDBS) as surfactant at room temperature and normal pressure. Field emission scanning electron microscopy (FESEM) indicates that the polymer is wrapped around the nanotubes. Measurement of the nonlinear refractive indices (n2) and the nonlinear absorption (β) of the samples with different MWNT concentrations measurements were performed by a single Z-scan method using continuous wave (CW) laser beam excitation wavelength of λ = 532 nm. The results show that both nonlinear optical parameters increased with increasing the concentration of MWNTs. The third order nonlinear susceptibilities were also calculated and found to follow the same trend as n2 and β. In addition, the conductivity of the composite film was found to increase rapidly with the increase in the MWNT concentration. © 2012 by the authors; licensee MDPI, Basel, Switzerland.

Sadeghi M.,Islamic Azad University at Eslamshahr
WSEAS Transactions on Systems and Control | Year: 2010

Increasing marketing competition with globalization force companies to expand diversity of the production lines which in turn improve the ability of choosing customizable products, improve the flexibility of system design and maintenance costs lead to a strong trend towards automation and distributed control systems. The plant is constantly adapted to the differences of products to achieve the highest production quality in a shortest possible time and so the automatic control have to be adapted, developed and upgraded based on changes in the plant conditions. Traditional production has typically relied upon a PLC as a Centralized hierarchy of Programmable Logic Controllers which is usually fixed or "hard-wired". For developing the system it should be shut-down and completely rewired which leads to a high cost and time consumption may last at least several weeks in often cases in production process. A new design methodology with open architecture for modeling industrial control systems has been developed. New international standard "IEC 61499", defines event driven functional modules called function blocks which can be distributed to field devices and interconnected across multiple controllers. It used for intelligent and agile control with more Portability, interoperability and configurability adds the system flexibility by adaption and reconfiguration basing on environment changes. It can be used for reducing the cost and complexity of industrial automation process. In this approach IEC61499 Function Blocks concept, Function Block Development Kit (FBDK), Function Block Run Time Environment (FBRT), Netmaster and Automatic Iron Cutting Device using IEC61499 FBs Editor will be discussed.

Khorami M.,Islamic Azad University at Eslamshahr | Khorami M.,Coventry University | Ganjian E.,Coventry University
Construction and Building Materials | Year: 2013

The need for sustainable, environmental friendly, energy efficient construction materials could justify the interest on fibre cement board produced from recycled waste cardboard. Waste cardboard has a low production cost and could show an appropriate compatibility with hydrated cement particles. This research was carried out in three phases. In the first phase of the research, the flexural behaviour of different amounts of fibre content (1-14%) in cement boards reinforced by waste cardboard was investigated. In the second phase, the optimum fibre content of 8% to achieve the highest flexural strength was determined. In the third phase, the effect of nanosilica fume and limestone powder on specimens reinforced by 8% fibre content was studied. The microstructure of specimens using Scanning Electron Microscope (SEM) was also carried out. The results show that flexural strength of cement composite board can be improved by adding 10% limestone powder and 3% nanosilica fume. © 2013 Elsevier B.V. All rights reserved.

Ranjbaran F.,Islamic Azad University at Eslamshahr | Mahdizade A.,Islamic Azad University at Eslamshahr
11th World Congress on Computational Mechanics, WCCM 2014, 5th European Conference on Computational Mechanics, ECCM 2014 and 6th European Conference on Computational Fluid Dynamics, ECFD 2014 | Year: 2014

In the last few decades the Viscous Damper (VD) is used for retrofitting or seismic designing in existing or new buildings. In this paper the effect of VD is evaluated in the steel Diagonal-Braced frames with 5, 10 and 15 stories under near fault excitation. For this purpose after designing of prototype structures and defining the parameters of dampers based on performance point, nonlinear dynamic analysis are used to assess the nonlinear behaviour of structures in the form of IDA and fragility curves. The results show the reduction of the responses especially in displacement and drift of prototype structures with greater height. The mechanism of structures with and without dampers is compared together.

Kazemi M.,Islamic Azad University at Eslamshahr | Verchery G.,Institut Supérieur des Matériaux et Mécaniques Avancés du Mans
Journal of Mechanics | Year: 2016

An innovative optimization technique is presented for the design of composite laminated plates subjected to in-plane loads. A list of quasi-homogeneous laminates that can be used as angle-ply materials is proposed as a comprehensive solution for optimum lay-up. Two optimization procedures are performed: Dimensioning of the flexural stiffness and the elastic modulus, which provides the optimal orientations for the layers and offer highest in-plane resistance to composite laminated structures. The polar formalism for plane anisotropy is used to represent the flexural stiffness and elastic modulus tensors. Numerical examples are resolved for two materials with different elastic moduli. Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2016

Loading Islamic Azad University at Eslamshahr collaborators
Loading Islamic Azad University at Eslamshahr collaborators